unreactive

Definitions of unreactive
1

adj (chemistry) not reacting chemically

Synonyms:
inactive
(chemistry) not participating in a chemical reaction; chemically inert
indifferent, inert, neutral
having only a limited ability to react chemically; chemically inactive
noble
inert especially toward oxygen
stable
not taking part readily in chemical change
Antonyms:
reactive
participating readily in reactions
activated, excited
(of e.g. a molecule) made reactive or more reactive
labile
(chemistry, physics, biology) readily undergoing change or breakdown
oxidizable
capable of undergoing a chemical reaction with oxygen
thermolabile
(chemistry, physics, biology) readily changed or destroyed by heat
unstable
highly or violently reactive
show more antonyms...

adj not tending to react to stimulation

Synonyms:
insensitive
not responsive to physical stimuli

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